Patent GB-1229594-A (GB)
IPC: B26F1/40
Filed: 1968-04-22
Abstract: 1,229,594. Cutting-out presses. BRITISH UNITED SHOE MACHINERY CO. Ltd. 22 April, 1968 [22 April, 1967], No. 18851/68. Heading B4B. [Also in Division F2] A cutting press comprises a lower platen for supporting a cutting block on which material to be cut and a superposed die can be supported, an upper platen, means for effecting relative heightwise movement between the lower and upper platens whereby to effect a cutting stroke of the press, and means whereby the upper platen can be moved widthwise relative to the lower platen to expose the material to be cut and the superposed die to facilitate manipulation thereof on the cutting block. The last mentioned means includes control means whereby, after a cutting stroke has been effected in the operation of the press, the upper platen is caused to move widthwise relative to the lower platen to an out of the way position, the control means being so arranged that the direction of such movement is opposite to the widthwise direction in which the upper platen was last caused to move prior to the cutting stroke being effected.  The press comprises a cutting table P, Fig. 1, supported on a lower platen support member T, and a beam J providing a support for a head K movable widthwise of the press and driven along the beam by a motor TM through a chain AK. The head K is provided with an hydraulically operated piston and cylinder which supports an upper platen ST for heightwise movement towards and away from the table P. The hydraulic pressure is provided by a pump motor PM, Fig. 3. The head K is further provided with a hand lever H movement of which to the left or right causes actuation of one of two switches B10 or B11 respectively of electrical control means to cause the motor TM to be switched into circuit for left or right movement of the head along the beam. Should the head reach one side or the other of the press before stopping automatically, it is brought to rest by rod members BR or BL, Fig. 1, engaging limit switches b13 or b12 respectively. Downward movement of the lever H actuates a switch B4 of the electrical control means to cause the platen ST to be moved heightwise relative to the table P. The control means comprises a variable lower limit feeler (b8), Fig. 2 (not shown), for setting the length of cutting stroke. The press is capable of effecting strokes of up to 12 mm. by a single hand operation of the lever H, the control means comprising a feeler (b7), Fig. 2, which is effective to limit the cutting stroke to a maximum of 12 mm. For cutting strokes exceeding 12 mm., a two hand operation of the lever H together with one of two trip buttons b5 or b6, Fig. 1, is necessitated which operation is effective to nullify the action of feeler (b7) and allow the cutting stroke to be effected under the control of feeler (b8) only. The circuit of the control means comprises an on-off gang switch a<SP>1</SP>, Fig. 3, a transformer TR, a relay C1 and a gang switch C1<SP>1</SP>, C1<SP>2</SP>, C1<SP>3</SP> associated therewith for operating a pump motor PM, a left traverse relay C2 and associated gang switch C2<SP>1</SP>, C2<SP>2</SP>, C2<SP>3</SP>, a right traverse relay C3 and associated gang switch C3<SP>1</SP>, C3<SP>2</SP>, C3<SP>3</SP> for operating motor TM, and a selector switch b14 operation of which determines whether widthwise movement of the head K is controlled manually or automatically.